Stay-bolt-testing device.



B. E. D. STAFFORD.

STAY BOLT TESHNG DEVICE.

APPLICATION FILED FEB. 8. |918.

Patented Mar. 25, 1919.

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BENJAMIN'E. D. STAFFORD, 0F PITTSBURGH, PENNSYLVANIA, ASSIGNOR TO FLANNERY BOLT COMPANY, OF PITTSBURGH, PENNSYLVANIA.

I STAY-BOLT-TESTING DEVICE.

Application led February 8, 1918.

\ To all whom t may concern:

Be it known that I, BENJAMIN E. D. STAF- ronn, a citizen of the United States, and a resident of Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented certain 'new and useful Improvements in Stay-Bolt-Testing Devices; and I do hereby declare the following to be a full, clear, and exact description ofthe invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to improvements in staybolt testing devices and more particularly to means for testing the integrity of staybolts in steam boilers-the object of the invention being to provide a simple and efficient device which may be readily applied to the tell-tale bore of a stay bolt for ascertaining whether said bore contains water which may have entered the same by reason of a fracture of the bolt.

7 ith this and other objects in view, the invention consists vin certain novel features of construction and combinations of parts as hereinafter set forth and pointed out in the claims.

- In the accompanying drawings; Figure 1 isa sectional view of a testing device embodying the invention, and Fig. 2 is a bot tom plan view of the same.

1 represents a hollow head provided with a handle portion 2 having a duct 3 communicating with the chamber l of said hollow head and the wall of said duct may be threaded at the free end of the handle portion' 2 for the accommodation of a suitable connection with an exhaust pump (not shown). The wall of the duct 3 may also be threaded at its inner end for the threaded end of a nozzle 5 projecting into the chamber 4' and this nozzle is provided rearwardly of its free end with a conical flange forming a defiector 6 within said chamber for a purpose hereinafter explained.

The forward end of the head 1 is threaded interiorly for the reception of the threaded rear threaded end of a nozzle 7. This nozzle may be conical in form and provided with an annular flange 8 to overlie the end of the head 1. The joint between the nozzle 7 and the head may be provided with suitable packing, as shown at 9, and a collar 10 of rubber or other yielding material may be applied to said nozzle near its free end Specification of Letters Patent.

Patented Mar. 25, 1919.

Serial No. 216,027.

to effect an air-tight connection withv a stay bolt l1, with the tell-tale bore 12 of which said nozzle is intended to communicate.

The hollow head lis made in its ybottom with an opening 13, with which av depending nipple 14 communicates, and a valve or shutter 15 is hinged to said head for closing the passage through said nipple. This valve or shutter is manually operable and to facilitate its manipulation, it may be provided With a finger piece 16.

In using the device for testing the integrity of a staybolt, the nozzle 7 will be applied to the tell-tale bore of the bolt as shown in Fig. 1, and the action of the suction pump connected with the duct 3 and through the nozzles 5 and 7 and chamber 4, with the tell-tale bore of the bolt, will exhaust the air from said tell-tale bore. In the event that the bolt had been fractured so that water would be contained within the tell-tale bore, such water would be withdrawn with the air and would be deflected into the nipple 111. The operator may now permit the valve or shutter 15 to open and by application of his linger to the open lower end of said nipple he would discover the presence of such water. He would thus be notified that the bolt is fractured.

If, upon examination of the nipple 14, it is found not to contain water, this fact would indicate that the bolt is whole and unbroken.

Having fully described my invention what I claim as new and desire to secure by Letters-Patent, is

1. A staybolt testing device, comprising a member having a chamber, a nozzle communicating therewith and adapted for application to the tell-tale bore of a stay bolt, means for connecting air exhausting means with said chamber and nozzle, said chambered member having an opening in its bottom in rear of said nozzle whereby water escaping with the air from the tell-tale bore may be detected and a closure for said opening.

2. A staybolt testing device, comprising a member having a chamber, a nozzle communicating with said chamber and adapted for application to the tell-tale bore of a stay bolt, means for connecting air-exhausting means with said chamber and nozzle, said member having means whereby water escaping with the air from the tell-tale bore may be detected, and means in said chamber for deecting water to said detecting means.

3. A staybolt testing device,rcomprisin, g`

a member having achamber `and a handle having a duct, said member also having an Y z outlet in itsbottom, a nozzle communicating `communicating therewith, said last-mentioned nozzle projecting forwardly from the chambered member and adapted for application to the tell-tale bore of a stay bolt.

ber, a nozzle projecting from said member and communicating with the chamber theref 1n, a nipple depending from said member and communicating with the chamber therein rearwardly of said nozzle, and a manually operable valve for said nipple.

In testimony whereof, I have signed this specification inthe presence of two subscribing witnesses.

BENJAMIN E. D. STAFFORD.

Witnesses: c n y ETHAN I. DoDDs, EDWIN SPENCER RYCE.

'copi-es of this patent may be obtained for ve cents each, by addressing the `Commissioner of-Patents,

Washington, Il. C. 

